Bug 577491: Labels should be in Sentence Style not Title Case

Labels should be in Sentence style

Also: Make some names like "Synchronize" view more obvious

Change-Id: I0931c50f4cf1223d998f459fa1449db70830ec93
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.team/+/188188
Reviewed-by: Wim Jongman <wim.jongman@remainsoftware.com>
Reviewed-by: Matthias Becker <ma.becker@sap.com>
Tested-by: Platform Bot <platform-bot@eclipse.org>